Is visible light located between 400 and 700nm?

Visible light is indeed located within the range of approximately 400 to 700 nanometers (nm). This range is essential because it corresponds to the wavelengths that the human eye can detect. Light with shorter wavelengths, below 400 nm, falls into the ultraviolet spectrum, while light with longer wavelengths, above 700 nm, is considered infrared. The range of visible light encompasses all the colors that can be perceived by the human eye—ranging from violet at 400 nm to red at 700 nm. This understanding is foundational in fields like optics and photonics, where the interaction of light with matter is studied, as well as in applications involving lasers and other light sources.